function chkdiv(divid){
	var chkid=document.getElementById(divid);
	if(chkid != null){return true; }
	else {return false; }	
}
if (chkdiv('fy')){
	document.getElementById('fy').innerHTML='上一篇：<a href="/News/2017-11/152098">2017-2018学年高中历史选修三（岳麓版）配套练习 </a>  下一篇：<a href="/News/2017-11/152100">2017-2018学年高中历史选修四（岳麓版）配套课件 </a> ';
}